A pedophile who's driving around looking for children so he can pull over and masturbate, and then leave.

Robby: Yo, dude. I just saw this guy and he was in this dark van.
Me: ...and?
Robby: He pulled over at the park, and he just sat in his car. It looked like he was jerking off.
Me: Oh! He was kiddy cruisin', eh?
Robby: Yeah.